In order to be creative, you don't have to be original.

We must move into the universe. Mankind must save itself. We must escape the danger of war and politics. We must become astronauts and go out into the universe and discover the God in ourselves.

We must all be alike. Not everyone born free and equal, as the Constitution says, but everyone made equal. Each man the image of every other; then all are happy, for there are no mountains to make them cower, to judge themselves against.

My business is to prevent the future.

That's the good part of dying; when you've nothing to lose, you run any risk you want.

Tell us again, for we forget, that work done without love is stillborn, mindless, and lost in the very hour of its deliverance.

I shall remain on Mars and read a book.